Improvement in copying-presses



w. SHRIVER.

Copying Press.

Patented Feb.13, 1872.

v )nvenon .WitnaSSe/S.

WALTER sHEIvEn, or NEW YORK, N. Y.

IMPROVEMENT IN COPYlNG-PRESSES.

Specification forming part of' Letters Patent No. 123,584, datedFehruary 13, 1872; antedated February 3, 1872.

SPECIFICATION.

I, WALTER SHRIVER, of New York City, State of N ew York, have invented an Improvenient in the lllnnnfacture ot' Copying-Presses, et' which the following' is ay speciicntion, ret'- eronce being' had to the nccon'l'panying drawing, of which. Y.

Figure l represents the screw end platen, connected; Fig. 2, details ofthe sanne, like parts in both being` referred to by the saine letters.

A represents the screw B, the platen of the press; and C the socket. The platen Bis cast with the socket C attached; the socket is bored ont and e recess, D, is formed in it, as

'shown in Fig, 2. Into the socket G the end ot' the screw A is fitted, having in it n groove, E, twice the depth of the recess in theI socket (l, which groove, when the screw is in its place in the socket, comes exactly opposite the recess D in the socket. When the screw and platen are to be connected ering, F, in halves, (Fig. 2,) with :t spring, G, behind it, is placed in the groove E in the screw and compressed 'into it. The end of the screw is inserted 'into the hole in the socket C, pressed down, and when the ring F comes opposite the recess D in the socket the spring` G forces the ring out into the recess. The ring,` F, being of al width eqna-lto twice the depth ot the recess D, fills the recess, and also projects halt' its width into the groove E in the screw, thus formingl a permanent and durable connection between the screw end the platen. Y

A rin g', in itself zt sprin g, may be substituted for the divided ring; F and the spring' G, but the connection is 'preferably made as above described.

VVlnit I claim as my invention is The method of connecting the screw and platen, as described.

Vf ALTER SHBIVER.

Vitnesses:

FREDERICK A. COYLE, JOHN DECKELMAN, J r. 

